Improvement in the manufacture of semolina and flour



I v `v i 3-Sheets-Shef-Lt 1. lG. A', BUOHHOLZY. Flour Mill.' No. 108,102( l Patented Oct. 11,1870.

-3 Sheetssheet 3.

G'. A'. BUCHHOLL Flour Mill. I f No. 108,102. N Patented otqu, 1870.

N. PETERS, PHOTO-UTNOGRAPNER. WASHINGTON. D C.

and again, the grain taking a zigzag course through the machine, until the ripped or torn fragments of grainarc all converted into semoliua, and discharged troni the machine bv the last sievc D5.

The rolls B l B* are driven from the. spur-wheel C, and the rolls B B3 and B from the spur-wheel G2, the pinions b of the inner rolls taking into theirvrespective spur-wheels, which are driven, as before stated, in opposite directions, so as to insure the rotation of the inner rolls in the proper direction, or toward `their fellow rolls. By suitable gearing, the outer rolls nrc driven at a slower speed than the inner rolls.

To this end on `the axles of the rolls carrying the pinions b, and at the opposite ends thereof', are keyed small pinions b, which severally take into a pinion, b2, oflarger diameter on the axle of the outer roll, and thus any. desired inequality of surface-speeds canl be given to the two rolls of each pair.-

Ihe crank-shafts d2, at the opposite ends` of the machine, are driven by belts and pulleys, actuated from any first mover, as indicated by the independent driving-belts G G, shown in fig. 1.

lhe several pairs of rolls (see'ig. 1l are mounted in bearings carried by independent ii'ames, which rest on the main framing, and are capable ot being adjusted by wedges and tightening screws to and from the central gearing.

These rolls are formed of steel, and after the pattern described and shown in the Letters Patent above referred to.

The action of the machine is as follows:

The hnlled grain being fed to the ripping-rods B from a hopper, not shown in the drawing, passes between them, and is torn or cut to pieces, and delivered onto the sieve D. As this sieve receives a rapid reciprocating motion from its crank-shaft and rod, the semolina, if any is formed, is here sifted out and discharged from the machine, in manner above described, -while the larger pieces are conducted to the first pair of semolina-rolls, to be further reduced, and soon in succession to all the other pairs of rollers after the rolls, and any that may be formed is subsequently to be separated from the semolina.

semolina, instead of using semolina-rolls, as described in my patent above mentioned, I form ilonr-rolls in the following manner:

I take steel cylindrical rollers, of suitable size, and form thereon square ribs, arranged either parallel to their axis or helieally. These ribs will be about twelve to the inch, their breadth being equal to the spaces between them. rlhe height of the ribs will be, say 'from one-thirtieth to one-fortieth of an inch.

These rolls, when driven at different speeds, as ex.- plained with respect to the scmolina-rolls, will act like shears upon the grain, and reduce it to Hour (without any crushing action taking place) with great facility.

Having now set forth the nature of luy invention, I wish it to be understood that I claim- 1. The successive ripping and cutting-rolls B B Bz B3, (more or less in number,) combined and placed at dilferent elevations, around a common center, and having intervals between them for the sieves. l 2. The combination of spur-wheels Cl C2, and pinions I) b1 b2, when relatively arranged and applied to the ripping and cutting-rolls, as described.

3.'A series of pairs of ripping-rolls, each of which is provided with an independent frame, adjustable ou the main frame to and from the central gearing, as described.l

In witness whereof, I, the said GUSTAVADOLPH BUCHHoLz, have hereunto set my hand the 12th day of July, A. D. 1870.

V G. A. BUCHHOLZ. Witnesses: A. K. WHiTe,

66 Chancery Lane. W. VVYNN,

24 Rog/LZ Exchange, London..

fine particles, as they are formed, are sifted ont. Thus little Hour is formed by the action of the semolina' lVhen, however, the result desired is flour and not 

